your probably better off just unplugging the knock sensors all together then running resistors in there. It doesnt run off voltage feedback from memory, it runs off frequency (It's early, I could be wrong but its not as simple as voltage)
It looks tune related. Timing and fuel changing as they are suggests that after some driver inputs the ECU is not happy with how the car is running and is adjusting the tune to fix the problem. The R33 ECU's are sensitive and all seem to be a bit different. For example when I had a stock ECU and some mild mods, car would not run on 10psi, would just cut out when it got to certain RPM, and when it was dynoed on 8psi only managed 141rwkw. Where as I know other R33's with the same mods got alot more power then that. Others wouldnt just cut the engine like mine did, but would hit R&R
Take out the resistors in your knock sensor circuit, i dont think thats working, maybe try just unplugging them. I think you will find, as suggested already, find a programmable ECU